/**
* Creates a new, blank PHP source file.
*
* @param string|NULL $ns
* If provided, the new document will have this namespace added to it.
*
* @return static
*/
public static function create($ns = NULL)
{
$node = new RootNode();
$node->addChild(Token::openTag());
if (is_string($ns) && $ns) {
NamespaceNode::create($ns)->appendTo($node)->after(Token::newline());
}
return $node;
}
